City lights could reveal E.T. civilization

In the search for extraterrestrial intelligence, astronomers have hunted for radio signals and ultra-short laser pulses. In a new paper, Avi Loeb (Harvard-Smithsonian Center for Astrophysics) and Edwin Turner (Princeton University) ...

New inexpensive solar cell design

One of the most promising technologies for making inexpensive but reasonably efficient solar photovoltaic cells just got much cheaper. Scientists at the University of Toronto in Canada have shown that inexpensive nickel can ...

We have a 'right to starlight,' astronomers say

The public's "right to starlight" is steadily being eroded by urban illumination that is the bane of astronomers everywhere, the International Astronomical Union said on Friday.

Mini beamer in a cellphone or PDA

(PhysOrg.com) -- Looking at photos on a cellphone display can be somewhat arduous. A new mini beamer will make it easier. The beamer is so small that it can be integrated in a cellphone or a PDA. As it does not need an extra ...

page 3 from 4